1 /* s_modff.c -- float version of s_modf.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
13 * ====================================================
15 * $NetBSD: s_modff.c,v 1.7 2002/05/26 22:01:57 wiz Exp $
16 * $DragonFly: src/lib/libm/src/s_modff.c,v 1.1 2005/07/26 21:15:20 joerg Exp $
20 #include "math_private.h"
22 static const float one = 1.0;
25 modff(float x, float *iptr)
30 j0_ = ((i0>>23)&0xff)-0x7f; /* exponent of x */
31 if(j0_<23) { /* integer part in x */
32 if(j0_<0) { /* |x|<1 */
33 SET_FLOAT_WORD(*iptr,i0&0x80000000); /* *iptr = +-0 */
36 i = (0x007fffff)>>j0_;
37 if((i0&i)==0) { /* x is integral */
41 SET_FLOAT_WORD(x,ix&0x80000000); /* return +-0 */
44 SET_FLOAT_WORD(*iptr,i0&(~i));
48 } else { /* no fraction part */
52 SET_FLOAT_WORD(x,ix&0x80000000); /* return +-0 */